Oral compositions

Abstract

A chewable composition for teeth-whitening comprising a first region and a second region separated by a barrier layer; the first region comprising carbamide peroxide having water content of about 2% or less, a wetting agent (e.g., glycerin), an anhydrous chewing gum base having water content of about 1% or less, an anhydrous fruit acid, and one or more gum additives; and the second region comprising a chewable composition comprising a gum base, a source of bicarbonate ion, and one or more gum additives. A kit comprising separate chewable compositions corresponding to the first and second regions, and methods for whitening teeth using the chewable composition are also provided.

What is claimed is: 
     
       1. A chewable composition for teeth-whitening, comprising
 an anhydrous chewing gum base having water content of about 1% or less, 
 an anhydrous fruit acid, 
 carbamide peroxide having water content of about 2% or less, and 
 one or more gum additives, 
 wherein, the ratio of gum base:carbamide peroxide:fruit acid, in percent weight relative to the composition, is about 10-50:1-20:0.5-8, and the one or more gum additives are present in an amount sufficient to reach 100% of the weight of the composition. 
 
     
     
       2. The chewable composition of  claim 1 , wherein the fruit acid is citric acid. 
     
     
       3. The chewable composition of  claim 1 , further comprising glycerin. 
     
     
       4. The chewable composition of  claim 3 , wherein the ratio of glycerin:gum base:carbamide peroxide:fruit acid, in percent weight relative to the composition, is about 0.5-5:10-50:1-20:0.5-8. 
     
     
       5. The chewable composition of  claim 4  wherein, the ratio of glycerin:gum base:carbamide peroxide:fruit acid in percent weight relative to the composition is about 1-3:20-35:5-15:0.5-4. 
     
     
       6. The chewable composition of  claim 5 , having a water content of about 2% or less. 
     
     
       7. The chewable composition of  claim 3 , wherein the fruit acid is citric acid. 
     
     
       8. The chewable composition of  claim 1  having a mass of about 0.2 g to about 10 g. 
     
     
       9. The chewable composition of  claim 3  further comprising precipitated amorphous silica, wherein the ratio of precipitated amorphous silica:glycerin or:gum base:carbamide peroxide:fruit acid, in percent weight relative to the composition, is about 0.5-5:0.5-5:10-50:1-20:0.5-8. 
     
     
       10. A chewable composition for teeth-whitening, comprising a first and a second region separated by a barrier layer,
 the first region comprising the chewable composition of  claim 1 ; and 
 the second region comprising a chewable composition comprising a source of bicarbonate ion, a gum base, and one or more gum additives, 
 wherein the source of bicarbonate ion and the gum base, respectively, are present in a ratio of about 5-30:15-50 in percent weight relative to the second region, and the one or more gum additives are present in an amount sufficient to reach 100% of the weight of the second region. 
 
     
     
       11. The chewable composition of  claim 10 , wherein barrier layer comprises one or more components selected from the group consisting of lipids, proteins, carbohydrates, synthetic elastomers, polymers, wax, fat, and a gum. 
     
     
       12. The chewable composition of  claim 10 , wherein the source of bicarbonate ion is sodium bicarbonate. 
     
     
       13. The chewable composition of  claim 10 , wherein the second region further comprises a metal carbonate at about 0.001-1% of the weight of the second region. 
     
     
       14. The chewable composition of  claim 10 , wherein the fruit acid is citric acid. 
     
     
       15. A chewable composition for teeth-whitening, comprising a first and a second region separated by a barrier layer,
 the first region comprising the chewable composition of  claim 4 , and 
 the second region comprising a chewable composition comprising a source of bicarbonate ion, a gum base, and one or more gum additives, 
 wherein the source of bicarbonate ion and the gum base, respectively, are present in a ratio of about 5-30:15-50 in percent weight relative to the second region, and the one or more gum additives are present in an amount necessary to reach 100% of the weight of the second region. 
 
     
     
       16. The chewable composition of  claim 15 , wherein barrier layer comprises one or more components selected from the group consisting of lipids, proteins, carbohydrates, synthetic elastomers, polymers, wax, fat, and a gum. 
     
     
       17. The chewable composition of  claim 15 , wherein the source of bicarbonate ion is sodium bicarbonate. 
     
     
       18. The chewable composition of  claim 15 , wherein the second region further comprises a metal carbonate at about 0.001-1% of the weight of the second region. 
     
     
       19. The teeth-whitening chewable composition of  claim 15 , wherein the fruit acid is citric acid. 
     
     
       20. A chewable composition for teeth-whitening, comprising a first and a second region separated by a barrier layer,
 the first region comprising the chewable composition of  claim 9 , and 
 the second region comprising a chewable composition comprising a source of bicarbonate ion, a gum base, and one or more gum additives, 
 wherein the source of bicarbonate ion and the gum base, respectively, are present in a ratio of about 5-30:15-50 in percent weight relative to the second region, and the one or more gum additives are present in an amount necessary to reach 100% of the weight of the second region.